... Density functional theory calculations were performed to investigate the copper-catalyzed borocyanation of 2-aryl-substituted 1,3-dienes. The computations show that the regioselectivity of the overall reaction is governed by the combination of the inherent regioselectivity of the borocupration and electrophilic cyanation steps. The π-conjugation effect of the 1,3-diene makes the terminal carbon at ...

... Density functional theory calculations were performed to investigate the iridium-catalyzed isomerization of 1-alkenes to trans-2-alkenes. The computations show that the originally proposed π-allyl mechanism is kinetically unfeasible. A metal–ligand cooperative mechanism was suggested to account for the experimental results. The reaction was found to begin with the C(sp²)–H oxidative addition of th ...

... In this work, N-doped porous carbons were synthesized by a one-step sodium amide activation of carbonized lotus leaf at 450–500 °C. The CO₂ adsorption properties of the as-synthesized carbonaceous materials were carefully investigated. In addition, the supercapacitor performance of the optimized sample was also preliminarily explored to examine its potential as the electrode material. These lotus ...

... Nitrous oxide (N₂O) from agricultural ditches is a non-negligible source of anthropogenic greenhouse gas (GHG) emissions, but few studies have addressed this topic in depth. On the other hand, although there are numerous reports that biochar application can affect N₂O emissions from soil, the understanding of the process and source of changes is still incomplete. To examine the effect of biochar a ...

... In this work, we developed a modified calcination and extraction method to obtain controllable micro/mesoporous nanoparticle samples POSS–MPS, which were synthesized through glycidyl polyhedral oligomeric silsesquioxane (G-POSS) grafting with aminopropyl-functionalized mesoporous silica (AP-MPS). The POSS–MPS was introduced into the cyanate ester (CE) matrix to optimize the dielectric properties a ...

... In this study, we introduced 1H-1,2,4-triazole into the ordered nanochannels of propyl amino functioned MCM-41 and then investigated the hybrids' proton conducting performance. A high proton conductivity of 8.34 × 10⁻³ S cm⁻¹ has been obtained at 120 °C, with 5 mol% mole ratio of dangling propyl amino and fully loaded 1H-1,2,4-triazole in the silica. The activation energy is 0.55 eV and 1.303 eV i ...

... In this study, N-enriched porous carbons were prepared by a facile synthesis method at low temperatures ranging from 400 to 500 °C. Sodium amide was used as both activator and nitridation reagent, and lotus stalk was used as the carbon precursor. The as-synthesized samples demonstrate the maximum CO₂ uptake of 3.88 and 5.62 mmol/g at 25 and 0 °C, respectively, at atmospheric pressure. Moreover, th ...

... Best management practice (BMP) in drainage ditch systems is of high concern due to its importance in intercepting and removing pollution. Biochar has recently become an interesting option for agricultural pollution elimination, but knowledge is still limited on the fate of nitrogen (N) in drainage ditch systems with biochar added into the sediment. This isotope tracer study examined the effects of ...

... The CO₂-capture potential of porous carbons that have been derived from phenolic resin and doped with nitrogen was assessed in this work. Using carbonized commercial phenolic resin as carbon precursors, a series of carbons have been synthesized using urea modification and KOH activation under different conditions. The activation temperature and mass ratio of KOH to precursor affected the CO₂ uptak ...

... Rechargeable lithium–iodine (Li–I₂) batteries are a promising electrochemical energy storage candidate due to their high energy and power density. However, the high solubility of iodine in electrolytes seriously deteriorates the electrochemical performance of Li–I₂ batteries. In addition, the low iodine content in the cathode impedes the enhancement of energy density. Active graphene (AG) has a la ...

... Thiol–ene click reaction was employed to synthesize a flexible hydrophilic cellulose sponge. The reactive vinyl group was introduced by silanization treatment with vinyl-trimethoxysilicane (VTMO), and the resulting silylated cellulose sponge (SCS) can be subsequently functionalized with various thiol-containing compounds such as 3-mercaptopropionic acid, via temperature induced thiol–ene reactions ...

... The feasibility of using fluorescence excitation-emission matrix (EEM) along with parallel factor analysis (PARAFAC) and nonnegative least squares (NNLS) method for the differentiation of phytoplankton taxonomic groups was investigated. Forty-one phytoplankton species belonging to 28 genera of five divisions were studied. First, the PARAFAC model was applied to EEMs, and 15 fluorescence components ...

... p38 mitogen-actived protein kinases (MAPKs) broadly exist from yeast to mammals and participate in diverse cellular responses to various stimuli, whose activation can be induced by the MAPK kinase 6 (MKK6). In this study, a novel MKK6 homolog from Litopenaeus vannamei (LvMKK6) was cloned and characterized. The transcript of LvMKK6 was 1465bp long with an open reading frame (ORF) of 987bp that enco ...

... Sulfur is an attractive cathode material in energy storage devices due to its high theoretical capacity of 1672 mAh g–¹. However, practical application of lithium–sulfur (Li–S) batteries can be achieved only when the major barriers, including the shuttling effect of polysulfides (Li₂Sₓ, x = 3–8), significant volume change (∼80%), and the resultant rapid deterioration of electrodes, are tackled. He ...

... Wheat yellow mosaic disease (WYM) became more serious in China in the recent years. Cultivation of resistant varieties is the major strategy for disease control. To identify WYM resistant genes in Chinese wheat cultivar ‘Yining Xiaomai’, a population of 106 recombinant inbred lines (RIL) from a cross between Yining Xiaomai and Zhen 9523 (WYM-susceptible) was generated. Phenotypic data of WYM resis ...

... The epithelial-mesenchymal transition (EMT) plays an important role in breast cancer metastasis, especially in the most aggressive and lethal subtype, "triple-negative breast cancer" (TNBC). Here, we report that CD146 is a unique activator of EMTs and significantly correlates with TNBC. In epithelial breast cancer cells, overexpression of CD146 down-regulated epithelial markers and up-regulated me ...